docs(04-04): complete block inspector plan — SUMMARY, STATE, ROADMAP updated
- BlockInspector with color/speed/direction/length param controls - UpdateParamsCommand for full undo/redo param editing - Phase 04 complete (4/4 plans), TL-04 requirement marked done - Progress: 14/14 plans (100%)
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Claude
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.planning/phases/04-timeline-editor/04-04-SUMMARY.md
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.planning/phases/04-timeline-editor/04-04-SUMMARY.md
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---
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phase: 04-timeline-editor
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plan: 04
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subsystem: ui
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tags: [canvas, timeline, inspector, color-picker, command-pattern, undo-redo]
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dependency_graph:
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requires:
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- phase: 04-timeline-editor/04-02
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provides: CommandHistory, DeleteBlockCommand, syncBlock, selectedBlock, _onSelectBlock callback
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provides:
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- UpdateParamsCommand (undoable color/speed/direction/length changes)
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- BlockInspector class rendering compact strip with all param controls
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- Inspector show/hide wired to block selection via _onSelectBlock
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- Block canvas fill uses params.color for visual distinction
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- Undo/redo refreshes inspector values via re-triggered _onSelectBlock
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affects: []
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tech-stack:
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added: []
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patterns:
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- "BlockInspector wired via callback: timeline._onSelectBlock = (block) => inspector.show(block)"
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- "Inspector delete wires via _onDelete callback to fire DeleteBlockCommand through timeline.history"
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- "UpdateParamsCommand uses module-level currentShowId (same pattern as existing commands)"
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- "Color change committed on 'change' event not 'input' — avoids command flood during color drag"
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- "Block canvas fill uses blockColor + '1a' hex suffix for ~10% opacity color accent"
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key-files:
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created:
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- lightsync/frontend/timeline/inspector.js
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modified:
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- lightsync/frontend/timeline/commands.js
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- lightsync/frontend/timeline/timeline.js
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- lightsync/frontend/app.js
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key-decisions:
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- "UpdateParamsCommand uses currentShowId (module-level var) not this._showId — matches existing command pattern in commands.js"
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- "Color input fires 'change' (not 'input') to create command — avoids flooding command history during native color picker drag"
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patterns-established:
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- "Inspector callbacks: _onSelectBlock and _onDelete on inspector — app.js wires both after creating inspector"
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requirements-completed: [TL-04]
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duration: 4min
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completed: 2026-04-06
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---
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# Phase 04 Plan 04: Block Inspector Panel Summary
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**Compact inspector strip between timeline and transport bar — shows animation label, color swatch, speed/direction/length controls — all param changes go through UpdateParamsCommand for full undo/redo support.**
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## Performance
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- **Duration:** ~4 min
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- **Started:** 2026-04-06T23:51:12Z
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- **Completed:** 2026-04-06T23:55:00Z
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- **Tasks:** 2
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- **Files modified:** 4 (1 created, 3 modified)
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## Accomplishments
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- `UpdateParamsCommand` added to commands.js with execute/undo storing old/new params shallow copies
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- `BlockInspector` class rendering inspector strip: animation label, color swatch → hidden color input, SPEED number, DIR select, LEN number, remove button
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- Inspector show/hide wired to block selection via `timeline._onSelectBlock` callback in app.js
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- Inspector delete wired via `_onDelete` → `DeleteBlockCommand` through `timeline.history`
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- Block fill on canvas uses `params.color + '1a'` for subtle color accent — color changes visible immediately
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- Undo/redo handlers re-trigger `_onSelectBlock(selectedBlock)` to refresh inspector values after command reversal
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- Docker build: clean (no errors)
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## Task Commits
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1. **Task 1: UpdateParamsCommand + BlockInspector module** - `e82fc4a` (feat)
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2. **Task 2: Wire inspector into timeline and app.js** - `8e084ca` (feat)
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## Files Created/Modified
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- `lightsync/frontend/timeline/inspector.js` — BlockInspector class with show/hide/_render/_wireEvents, imports UpdateParamsCommand
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- `lightsync/frontend/timeline/commands.js` — UpdateParamsCommand added with currentShowId-based sync
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- `lightsync/frontend/app.js` — imports BlockInspector + DeleteBlockCommand, wires inspector to timeline
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- `lightsync/frontend/timeline/timeline.js` — block color accent from params.color, undo/redo re-triggers inspector refresh
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## Decisions Made
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| Decision | Rationale |
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|----------|-----------|
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| UpdateParamsCommand uses `currentShowId` not `this._showId` | The plan's code had `this._showId` which doesn't exist — commands.js uses module-level `currentShowId`, same as all other commands |
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| Color change on `change` not `input` | Native color pickers fire `input` continuously during drag; committing on `change` prevents hundreds of undo steps for one color change |
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## Deviations from Plan
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### Auto-fixed Issues
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**1. [Rule 1 - Bug] Fixed UpdateParamsCommand._showId → currentShowId**
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- **Found during:** Task 1 (UpdateParamsCommand implementation)
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- **Issue:** Plan's code used `this._showId` in syncBlock call, but commands.js uses module-level `currentShowId` — `this._showId` is undefined
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- **Fix:** Used `currentShowId` (module-level variable) matching the exact pattern of PlaceBlockCommand, MoveBlockCommand etc.
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- **Files modified:** `lightsync/frontend/timeline/commands.js`
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- **Committed in:** e82fc4a
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---
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**Total deviations:** 1 auto-fixed (Rule 1 - Bug)
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**Impact on plan:** Essential fix — `this._showId` would be undefined at runtime, breaking backend sync for all param changes.
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## Issues Encountered
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None — all other implementation matched the plan exactly.
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## Known Stubs
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None — inspector is fully wired. All param changes route through UpdateParamsCommand. Color accent on canvas reflects actual block color. Remove button fires DeleteBlockCommand. Undo/redo refreshes inspector.
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## Self-Check: PASSED
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- `lightsync/frontend/timeline/inspector.js` exists: YES (e82fc4a)
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- `inspector.js` exports `BlockInspector`: YES
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- `commands.js` has `UpdateParamsCommand`: YES (e82fc4a)
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- `app.js` imports `BlockInspector` and `DeleteBlockCommand`: YES (8e084ca)
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- `app.js` wires `_onSelectBlock` and `_onDelete`: YES (8e084ca)
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- `timeline.js` uses `blockColor + '1a'` for fill: YES (8e084ca)
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- `timeline.js` undo/redo re-triggers `_onSelectBlock`: YES (8e084ca)
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- Docker build: SUCCESS (clean)
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## Next Phase Readiness
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- Timeline editor is feature-complete: block place/move/resize/delete/params all undoable
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- Inspector provides full visual feedback for selected block parameters
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- Phase 04 is complete — all 4 plans done
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- No blockers
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---
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*Phase: 04-timeline-editor*
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*Completed: 2026-04-06*
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